Grinding machine



June 23, 1925. 1,542,876

' B. M. w. HANSON GRINDING MACHINE Filed Aug. 20, 1921 5 Sheets-Sheet 1 gnoznto'o dwcw mm.

June 23, 1925.

B. M. W. HANSON GRINDING MACHINE FiledJAug. 20, 1921 .5 Sheets-Sheet 2 June 23, 1925. 1,542,876

B. M. w. HANSON GRINDING MACHINE Filed Aug. 20, 1921 5 Sheets-Sheet 5 June 23, 1925. B. M. W. HANSON GRINDING MACHINE 5 Sheets-Sheet 4 Filed Aug. 20 1921 gm/wanton ("i @Wgl 2113mm ,VIY. I l

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B. M. W. HANSON June 23, 1925.

GRINDING MACHINE Filed Aug. 20, 1921 5 Sheets-Sheet Patented June 23, 1925.

UNITED STATES BENGT M. W. iHLNSON, OF HARTFORD, CONNECTICUT.

GRINDING MACHINE.

Application filed August'20, 1921. Serial No. 493,780.

To all whom it may concern:

Be it known that I, BENGT M. W. HAN- SON, a citizen of the United States, and a resident of Hartford, county of Hartford,

.. State of Connecticut, have invented certain new and useful Improvements in a Grinding Machine, of which the following is a specification.

This invention relates to metal working machines and has as its aim to so organize the parts of such a machine that the operations may be carried out upon the work with the greatest efficiency, particularly as to accuracy, uniformity and expedition.

The improvements of the present invention find particular utility inmachines for grinding ball races, (the embodiment of the invention which is here selected for illustration and description) where the ball race itself is slowly rotated on its own axis so as to present the full circumference of the race to the action of the grinding wheel; the ball race is rocked or oscillated across the grinding wheel so that the full width of i the race will be presented thereto; the grinding wheel is rotated at a high speed, and

fed into the work as the cutting action proceeds.

' In accordance with the present invention, means are provided for very accurately adjusting the parts relative to one another, and maintaining them in proper position, and the movements of the race and the *gri'nding'whee'l are brought about with regand longitudinally through the work holder- (ular and smooth movements free from vibrations or other influences tending to give irregular motions. i

It is to be understood that, while the various features of construction of theprcsent invention are herein described with ref erence to their use in a machine for grinding ball races, they are susceptible of other.

uses, the present disclosure being by way of illustration only and it is not to be taken as restrictive of my conception.

In the accompanying drawings Fig. 1 is a side elevation of the machine.

Fig. 2 is an end view looking in the direction of the arrow Fig. 1.

Fig. 3 is a view in section taken vertically F ig. 4 is a detailed view of the stops for longitudinally positioning the work spindle.

Fig. is afront View of the chuck.

Fig. 6 is a vertical transverse view taken substantially on line 6-6 of Fig. 1.

' and that the transverse curves of Fig. 7 is a sectional view taken on line 77 of Fig. 6. I

Fig. 8 is a detail view, in plan, of the mechanism for stopping oscillation of the .work holder at a predetermined position.

The general arrangement of the machine will first be described: A denotes the or frame of the machine on which is mounted the work support or holder B carrying the chuck C. 6 1) denotes a tool holder mechanism mounted on the frame A and carryingthe operating tool, which, in the present instance, is shown as a grinding wheel E.

The work support or holder B includes an oscillating head 7' and a carrier 9 mounted on gibs h of the head Mounted in suitable bearings in this carrier isthe chuck spindle z. The oscillating head f is firmly supported against vibration between the foot-bearing 7c and the overhead bearing Z, the latter being mounted in the bracket or standard m. A shaft 71 extends through the foot-bearing [a and is connected to the oscillating head f as shown most clearly in Fig. 3. This shaft and the work holder B connected thereto is oscillated in any suitable manner, as through a crank o in order to present the full width of the race carried b the chuck C to the grinding wheel.

It wil be understood that in grinding a ball race the oscillating motion should take place from that center about which the transverse curve of the race is ori inated, ifferent types of races have differentradii. By providing forthe adjustment of thecarrier g on a head 7", the center of transverse curvature of the bearing to be ground maybe brought into coincidence with the center about which the work holder is oscillated,

base

that;is the axis of the shaft n, and thus the machine has a more or less universal application in grinding races of various types.

Reference in detail will now be made to the driving means for rotating the chuck C, which means is of advantage in that it drives the chuck with a smooth and regular movement free from vibration and chattering, and without interfering with the adjustment of the chuck or with the oscillation thereof. 'This driving means, as will be seen most clearly from Fig. 3, includes a driven shaft Sex-tending through the'overhead bearing Z and having a bearing in that member 10 thereof which is fixed to the oscillating head f. Fixed to the upper end of this shaft is a pulley 11 driven by a belt 12. On the lower end of the shaft 9 is a bevel gear 14 meshing with a similar gear 15 on an intermediate shaft 16 journaled in the head On the rear end of this shaft is a pinion 17 connected by intermediate pinion 18 with a pinion 19 fixed to a. driving shaft 20 'ournaled in the carrier '9 and provided with a relatively long pinion 22 meshing with a gear 23. This gear 23 has a bearing on a sleeve 24, which is connected by a flexible disk 26 to a plate .27, to which is keyed, as at 28, a ring 29 fixed to the rear end of the'work spindle i. This flexible or leather disk 26 is of advantage in that it prevents transmission of vibrations from the drivin connections to the spindle z. The interm' 'iate pinion 18 is mounted in a swinging arm 30 so that it may be brought into meshin relation with the gear 19 in any position 0 adjustment of the carrier g. It will be seen-that since the drive for the spindle is through the overhead hearing, this drive does not in any way interfere with the oscillation of the work holder, and as the various shafts are mounted in substantial hearings in the head f and carrier 9, they are firmly and steadily sup ported against vibration.

The spindle i is carried by suitable bearings 34 in a quill 35 positioned within the sleeve 24 and held againstmovement relative thereto by a removable screw 37 For the purpose of adjusting the chuck axially so that he ball race carried thereby may be brought into such position that the center of the transverse curvature of the race will be coincident with the axis about which the workholder is oscillated, the sleeve 24 together with the quill $5 and the chuck spindle 2' carried thereby is longitudinally adjustable in) the carrier g, and means are provided for locking this assembly in any positi0n of adjustment. In the present instance,

longitudinal adjustment of the sleeve is brought about by a handle 39 fixed to a shaft 40 on the inner end of which is a pinion 41 meshing with a rack 42 on the sleeve 24. For the purpose of locking the sleeve 24 in any position of adjustment, there is secured to this sleeve a stud 44 extending through a plate 45 engaging the surfaces 46 on the carrier g, and this plate 45 is clamped against the carrier by turning up a nut 47.

This nut may be conveniently turned by means of the handle 48.

The provision for lon itudinally adjusting the chuck spindle Within the carrier 9 is also of advantage in that where a double ball race, as shownin Fig. 3, is operated upon, the chuck may be moved to bring first one and then the other of the grooves of the bearing member into operative position relative to the axis about which the work holder is oscillated. For thus longi: tudinally positioning the chuck spindle, a stop 50, as shown in: Fig. 4, is provided on the sleeve 24 for co-operation with a pair of adjustable stop screws 51 on the carrier 9. It will now be seen that after the screws 51 are properly adjusted for positioning the chuck for operation upon one double ball race member, this adjustment may be used for operation upon other similar ball race members.-

The construction of the chuck C, as hereinafter described, is such that by making the proper adjustments this chuck will hold ball races of different sizes and types, but in making these adjustments considerable time is required. In order to reduce the time during which the machine is idle while changing from one job to another, the arrangement is such that after one job is done the chuck and spindle which has been used for that job may be readily removed from the work holder B, and a second spindle and chuck which has been adjusted or fitted to carry the work of the newjob may be readily positioned Within the work holder. Thus one chuck and spindle may be used in the machine.v of the present invention while a second chuck may be operated upon in another machine to receive the work of a new job. To this end the quill 35 together with the spindle 21 carried thereby is removably mounted in the sleeve 24, it being detachably secured thereby by the bolt or screw 37. The key arrangement 28 between the plate 26 and the ring 29 permits of this removal of the spindle.

To accommodate ready withdrawal of the grinding wheel from the ball race after the grinding operation has been completed, means are provided for automatically stopping the work holder in its oscillatory movement in a predetermined position, and which position may be such that the chuck spindle is in parallel alinenient with the grinding wheel spindle; also, at the same time, the power may be thrown oil of the work spindle- From Figs. 1, 2 and 8, it will be noted that the crank or disk 0 is connected by a pitman to a crank arm on the shaft n. The crank disk 0 is rotated through suitable gearing including a worm 106, and a worm wheel 10? fixed to the same shaft as is the crank 0. The worm 106 is carried by a shaft 108 driven through a clutch 109. As shown in Fig. 8, on the [under side of the crank 0 are two dogs110 which are adapted to cooperate with an abutment 111 on a link 112 having one end pivotally connected to an arm 113 fixed to a stud 114 which also carries a yoke arin 115 connected to the slidable member of the clutch 109. The other end of the link 112 is connected by means of a link 117 to an ing a handle 120. The extent to which this handle may be turned is limited by stops 121. Also'carried by the stud 114 is an arm' such direction that the clutch 109 is disconnected; at the same time the clutch controlling the power to the belt 12 is disconnected. The dogs 110 are so positioned on the crank. 0 that when they engage the abutment 111 they cause the work holder to stop in a position where the chuck spindle is in parallelism with the grinding wheel spindle. The grinding wheel may now be easily withdrawn without striking the ball race. When it is desired to throw the power on, the handle 120 is thrown into the dotted line position Fig. 8, thus withdrawiug the abutment 111 from the dog 110 whereupon the spring 128 will engage the members of the clutch 109.

The chuck C, as most clearly shown in Figs. 3 and 5, comprises a chambered head or body 53 provided with clamping members or bolts 51, which are arranged as follows in the annular wall of the head 53 are a number of recesses 55, preferably three in number, and in each ofthese recesses 1s a nut-keyed against turning, as at 57, and recelving the inner end of a clamping bolt 54. Also 1n each recess 1s a bushing 58 engagingthe nut 56..--'Each. bushing. 58 isadjustable lengthwise by screws 59 carried by the head 53 and overhanging the bushing. It

will be seen thatwith this arrangement the clamping members may be readily and accurately adjusted to accommodate bearing members of different lengths and also to take up wear; also the clamping members may be very quickly turned into and out of overhanging engagement with the ball race member so that the latter may be quickly inserted and removed from place within the chuck.

'Removably' screwed to the bottom face of the head 53 is a ring 60 having a plurality, preferably three, lands or spots 61. Carried by the side wall of the chuck body are spots '62 which are preferably in theform of studs secured in place bynuts 63 so that theymay be readily positioned and removed from place. The advantage of thesespots is that by properly grinding them after in the chuck body they may be correctly trued up to hold the bearspeaking,

mg member to be operated upon in the proper position. Shims 64 are provided to take up wear in the spots 62. As previously stated, the rigging up of the chuck C may take place in a machine apart from the machine here described.

Reference will now be made to the tool holder mechanism D which is most clearly shown in Figs. 1 and 6. This mechanism includes a carriage p mounted for transverse movement on the bed A so as to feed the grindingwheel E into the work as the grinding operation proceeds; and a slide Q mounted for longitudinal movement on the carriage p and carrying in suitable bearings the grinding wheel spindle r, which of course is to be driven at a high speed through any suitable mechanism, as by means of a bolts.

'The slide Q, is mounted on the carriage p in the following manner:

Secured to the top of the carriage p-along its front and rear edges respectively are supporting members in the form of ways or gibs 67, 68 and the slide Q is positioned be tween these gibs and has laterally extending flanges 69 positioned beneath and engaging the under sidesof the gibs 67, 68. In the overhanging under side of the ib 67 is a dovetail groove 70 in which sli es a doveail gib 71 secured to one of the flanges 6'3.

Secured to the top of the other-flange 69 is a gib 72 which forms a groove receiving the overhanging portion of the gib 68. 7 3 indicates a guard for preventing grit, dirt or the like from aining access to the contacting surfaces between the gibs 68, T2. It will be noted that with the arrangement just described the slide Q, extends below the supporting gibs 67, 68 and arises between these gibs, and the slide, in one manner of is suspended from these supportmg gibs. Asthe groove 70 is on the under side of the gib 67 grit or dirt cannot find its way to this groove and result in wear between the 'parts. The arrangement described is also of advantage in that contact between the npperfaces of the flanges 69 and the bottom faces of the gibs 67, 68 determines the vertical position of the slid orden to take up this wear and bring the grinding wheel spindle back to the proper center to remove the gibs 71, 7 2 and grind off their lower faces to ,the extent that when these gibs are again assembled; on the flanges 69, the upper faces of the latter willengage the under facesof the gibs 67, 68; The slide Q, is moved longitudinally to bring the grinding wheel into and out of 0 erative' position by a hand wheel 74 fixe on a shaft 75 carrying a pinion 7 6 (see Fig. 1) meshing with a rack 77 fixed to the slide.

the frame A as at 84 and carrying in its upper end a block 85 which works up and down in a slot or recess 86 in the part 82. The lever 83 carries a roller 87 cooperating V with a cam 88 fixed to a shaft 89 on which I to keep the roller 8? is a worm wheel 80 meshing with a worm 91 on a worm shaft 92 which may be manually turned by the hand wheel 93 or auto matically rotated through the ratchet mech- The lever is normally urged in a direction in engagement with the cam 88 by means of a weight 95 (see Fig. 2) connected to the lower end of the lever 83 by the straps 96. It will be seen that by rotating the screw 80 the carriage is transversely adjusted to bring the grinding wheel carried thereby into proper relation to the work. Upon the rotation of the cam 88 the lever 83 is swung in a direction to feed the grinding wheel into the work as the grinding operationproceeds. To take up the wear in the grinding wheel, it is merely necessary to turn the screw 80 and thus ad ust the carriage relative to the past 82 and, for accurately determining the extent of this adjustment, the periphery of the operatin wheel 97 on the screw 80 is provided wit a scale 98 with which coopcrates an indicating pointer or-mark 99.

I claim as my invention 1. In a machine of the character described, an oscillating head, a foot bearing and an overhead bearing between which said head is supported, a carrier transversely adjustable on said head, and a spindle rotatably 'carried by said carrier and extending through said head, said spindle being longi-i tudinally adjustable in said carrier in a plane to which the axis of said bearings is perpendicular.

2. In a machine'of the character described, an oscillating head having a vertical face provided with gibs, a carrier slidably mounted on said gibs, and a spindle rotatably carried by and having longitudinal adjustment in said carrier.

3. In a machine of the character descrlbed, an oscillating head having a vertical face provided with upper and lower ways and an opening between said ways, a horizontally extending carrier mounted on said ways for lateral movement, and a spindle rotatably mounted in said carrier and extending through said opening between said ways, said spindle being longitudinally adjustable in said carrier. v

4. In a'machine of the character described, an oscillating head and an adjustable carrier thereon, anon-rotatable sleeve mounted for longitudinal adjustment in said carrier, a removable quill non-rotatably mounted in said sleeve, and a spindle rotatably supported in said quill and removable therewith.

5. In a machine of the character described, an oscillating support including a laterally adjustable carrier, a sleeve mounted for longitudinal adjustment in said carrier, a quill removably mounted in said sleeve, a spindle rotatably mounted in said quill, means for longitudinally adjusting said sleeve and the quill and 1 spindle ca-rried' sleeve inany position of adjustment. anism denoted generally by the numeral 94.

sleeve; means including a pinion and a 00- operating rack on said sleeve for longitu dinal'ly adjusting the latter, and means for clamping said sleeve in any position of adjustment. I

7. In a machine of the character described,

an oscillating support including an 'ad-- justable carrier; a sleeve mounted for longitudinal adjustment in said carrier; a spindle rotatively mounted in andfixed against longitudinal movement relative to said sleeve; means including a pinion and a cooperating rack on said sleeve for longitudinally adjusting the latter; and means for clamping said sleeve in any position of adjustment and comprising a plate connected to'said sleeve and slidably engaging said carrier and means for binding said plate against said carrier.

8. In a machine of the character described, an oscillating head and an adjustable carrier thereon; a sleeve longitudinally adjustable in said carrier; a quill located in said sleeve; a spindle'rotatably mounted in said quill; means for longitudinally adjusting the assembly comprising said sleeve, quill and spindle; and means for clamping said assembly in any position of longitudinal adjustment and including a stud se-.

mounted in said carrier with its axis dis-. posed substantially at right angles to theaxis of said head, a spindle rotatably carried by said sleeve and adapted to move therewith, and means for longitudinally adjusting said sleeve and the spindle carried thereby.

11. In a machine of the character described,

an oscillating head, a carrier laterally adjustable thereon, a sleeve mounted in said carrier and extending through said head and havinglongitudinal adjustment in said carrier-substantially at right angles to the axis of the head, a spindle rotatably carried by said sleeve, a chuck carried by said spindle and adapted to hold a multi-grooved bearing member, and means for longitudinally positioning said sleeve and spindle to bring the several grooves of the bearing member carried by the chuck into operative position.

12. In a machine of the character described,

a con inuou'sly oscillating head, an ad- .of said spindle, and, means for clamping said spindle in any desired position of longitudinal adjustment.

13. In a' machine of the character described, an oscillating head, a carrier ad- .justable thereon, a sleeve slidably mounted in said carrier, a spindle carried by suitable bearings in said sleeve, means for longitudinally adjusting said sleeve, means for de termining the longitudinal positions of said a sleeve, and meansfor clamping said sleeve in any position of adjustment.

14. In a machine of the character described, an oscillating support, a quill mounted within but quickly removable from said support, and a spindle rotatably mounted within'said quill.

1'5.'Ina machine of the character described, a support, a non-rotatable quill ried by said quill,and means for longitudi nally adjustin said quill together with the spindle carrie ther by.

16. In a machine of the character described, a support, a nonrotatable quill removably mounted therein, a spindle rotatably carried by said quill, driving means for said spindle, and a quick detachable-connection between said driving means and spindle.

1.7. In a machine of the character described, an oscillating support including acarrier, 9. non-rotatable sleeve mounted in sald carrier for longitudmal movement, a

non-rotatable quill mounted in and quickly removable from said sleeve, a chuck spindle rotatably carried by said quill and removable therewith, and means for longitudinally adjusting said sleeve together with the quill and the spindle carried thereby.

18. In .a machine of the character described, a support, a non-rotatable sleeve mounted for longitudinal adjustment therein, a quill removably mounted in said sleeve,

a spindle rotatably mounted in saidquill,

means for detachably connecting said quill and sleeve; means for longitudinally adjusting the assembly including said sleeve, quill and spindle; and means for clamping said assembly in anyposition of adjustment.

19. In a machine of the character described, an oscillating support, a carrier laterally adjustable thereon, a sleeve longitudinally adjustable therein, a quill removably carried by said sleeve, a spindle rotatably mounted in said quill, driving mechanism for rotating said spindle and including a gear carried by said sleeve and a quick, detachable connection between said gear and spindle, and means for longitudinally adjusting said sleeve.

20. In a machine of the character described, an oscillating support, a bearing 21. In a machine of the character described, an oscillating support, a bearing supporting the same, a carrier laterally adjustable on said support, a spindle within said carrier and disposed at an angle relative to the axis of oscillation of said support, a drive shaft-extending through sald bearing, an intermediate shaft located in said support and driven by said drive shaft, a shaft ournalled in said carrier and connected to said spindle, and an adjustable connection between said intermediate shaft and said last mentioned shaft.

22. In a machine of the character de scribed, an oscillating head, a bearing supporting the same, a carrier adjustably mounted on said head, a spindle rot'atably mounted in said carrier, and driving means for rotating said spindle leading through said bearing and carried in part by said head and in part by said carrier. I

23. In a machine of the character described, an oscillating head, a bearing supporting the same, a carrier adjustably mounted on said head, a spindle rotatably mounted in said carrier, a driven shaft extending through said bearing, a drive shaft mounted in said carrier and geared to said spindle, and an adjustable connection between said driven shaft and drive shaft.

24. In a machine of the'character described, an oscillating head, abearing therefor, a carrier adjustably mounted on said head, a spindle rotatably mounted in said carrier, a driven shaft extending through said bearing, an intermediate shaft in said head geared to said driven shaft, a drive shaft mounted in said carrier and geared to said spindle, and an adjustable gear connection between said intermediate and drive shafts.

25. In a machine of the character described, an oscillating) support, a foot bearing and an overhead caring supporting the same, means for oscillating said support including a shaft extending through said foot bearing and connected to said support,

.a spindle rotatably mounted in said support, and driving means for rotating said spindle including a shaft extending through said overhead bearing.

26. In a machine of the character described, an oscillating head, a foot bearing and an overhead bearing supporting said head, a carrier adjustably mounted on said head, a spindle rotatably mounted in said carrier, means for oscillating said head including a shaft extending through said foot I bearing and connected to said head, and

driving means extending through said overhead bearing for rotating said spindle.

27. In a machine of the character described, a carrier, a sleeve longitudinally adjustable therein, a spindle rotatably mounted in said sleeve, a drive shaft in said carrier provided with a relatively long pinion,

a gear having a bearing on said sleeve and meshing with said pinion, and a drive connection between said gear and spindle.

28. In a machine of the character described, a horizontally extending supporting member, a slide member having a portion positioned beneath and engaging the under side of said first member, and a cooperating dovetail gib and groove on the contacting surfaces between said members, said ib being removable from the member to w ich it is attached.

29. In a machine of' the character described, a horizontally extending member provided with a dovetail groove on its un der side, a slide having a portion extending beneath and engaging the under side of said first member, and a removable dovetail gib on the upper face of said portion and engaging in said groove.

30. In a machine of the character described, a. pair of supporting members, a

slide positioned between said supporting members and having portions engaging the under sides of the same, and cooperating ways between said supporting members and said portions.

31. In a machine of the character described, a pair of spaced apart parallel sup-' with ,overhanging ways, a spindle-carrying slide arising between and extending a ove said ways, and means for suspending said slide on said ways.

33. In a machine of the character described, a carriage, a slidable part, a screw connecting said part and said carriage,

means for turning said screw to adjust said carriage relative to said part, a lever, a block carried by said lever and slidable Within said part, and means for swinging said lever to feed said carriage.

34. In a machine of the character described, a carriage, means for feeding said carriage, a connection'therebetween including a screw for adjusting said carriage, and means associated with said screw for measuring the arc of rotation of said screw.

35.'In a machine of the character described, a carriage, means for feeding said carriage, a connection therebetween including 'a screw for adjusting said carriage, and means associated with said screw formeasuring the arc of rotation of said screw, said measuring means including a scale rotatable with said screw and an indicating mark cooperating with said scale.

36. In a machine of the character described, an oscillating support, a spindle mounted therein, and means for automatically stopping said support in a predetermined position.

37. In a machine of the character described, an oscillating support, a spindle mounted therein, and hand operated means for automatically stopping said support in a predetermined position.

38. In a machine of the character described, an oscillating support, a work spindle mounted therein, a grinding wheel spindle, and means for automatically stopping said support with said work spindle in parallelism with said grinding wheel spindle. Y

39. In a machine of the character described, an oscillating support, means for oscillating the same, a spindle mounted in said support, and means actuated by said' oscillating means for throwing the power off and thus stopping said support in a predetermined position.

40. In a machine of the character described, an oscillating support, means for oscillating the same, a spindle mounted on said support, a clutch through which said oscillating means is driven, and means for disconnecting said clutch including a dog associated with said oscillating means, and a hand operated part adapted to be moved into the path of said dog.

41. In a machine of the character described, an oscillating support, means for oscillating the same including a rotatable member, a dog on said rotatable member, a clutch through which said rotatable memher is driven, a crank lever connected to said clutch, a hand operated lever, a link connected to said hand operated lever, a second link connected at one end to said first link and at its other end to said crank lever, and

' an abutment on said second link adapted to cooperate with said dog. v

42. In a machine of the character described, an oscillating support, a spindle mounted therein, and means for automatically throwing the power oil" of said spindle and stopping said support in a predetermined position.

43. In a machine oi. the character described, an oscillating support, means for oscillating the same, a clutch through which said oscillating means is driven, a rotatable spindle mounted in said support, driving means for rotating said spindle, means actuated by said oscillating means for disconnecting said clutch to stop said support in predetermined position, and a connection between said clutch and driving means for disconnecting the latter.

Bauer M. W. HANSON. 

